Superheater-boiler.



J. B. BELL.

SUPBRHEATBR BOILER.

APPLICATION TILED MAY 21, 1900.

1,051,829, Patented Jan. 28, 1913.

2 SHEETS-'SHEIJT l.

WITNESSES INVEII'I'OR I ya g g,

BELL.

SUPP-REBATES. BOILER.

APPLIOATION FILED MAY 21, 1906.

1,051,829, Patented Jan.28,1913.

2 HHEETS'SHEET 2.

Wrrmnsaas mvem'on so h JOHN E. BELL, OF NEW YORK, N. Y.,

OF NEW YORK, N. Y.,

ASSIGNOR TO THE BABCOCK & WILCOX COMPANY, A CORPORATION on NEW JERSEY.

SUPERHEATER-BOILER.

Specification of Letters Patent. Application filed May 21, 1906.

Patented J an. 28, 19.13. Serial No. 317,856.

To all whom it may, concern.-

Be it known that I, JOHN E. BELL, of New York, county and State of New York, have iiwented a new and useful Superheater-Boiler, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a sectional side elevation showing one form of boiler constructed in accordance with my invention; and Figs. 2 and 3 are side elevations of boilers showing modified forms of the invention.

My invention relates to superheater boilers, wherein superheaters are combined in the setting with boilers having transverse steam and water drums connected by banks of tubes to a lower transverse mud rum or drums, the gases coming from a source of heat in front of the front bank, and having successive up and .down passes through and across the banks.

The object of the invention is to' provide a simple, efiicient and practical superheater boiler of this type which will properly protect the superheater-from the intense heat of the flame and gases, while at the same time imparting the desired degree of supereat. i

The invention consists in placing the super-heater in a pocket in the rear of one of the banks of tubes so that the gases must pass through the bank before reaching the superheater, although the superheater is in the sanie pass with such bank.

The invention further consists in the combining a U-shapedsuperheater with a boiler of the above type, and further in the construct-ion and arrangement of parts as hereinafter more fully described and claimed.

In the drawings, referring to the form of Fig-]., 2, 3 represent transverse parallel steam and Water transverse mud drum connected with the steam and water drums by the banks of tubes 6, 7 .and 8. 9 represents water circulating tubes between the drums 2 and 3, and 10 are steam tubes which lead the steam into the middle druln'3 from which it is taken off A battle l2'ext-ends along the back of the front bank, while another battle 13 extends along the back of the second bank-to hold the gases in the second bank during the second or down pass. The superheater drums, and 5 a lower' 14 is placed in the rear of the second bank 7, and the battle 13 is provided with a stepped extension 15 which extends back of the superheater. In order to compel the gases to pass over the superheating tubes in their second pass, I preferably employ battle de vices 16 which extend rearwardly from the battle shelf 17. of the front bank, and extend between the tubes of the second bank 7. These battle devices 16 may be in the form of recessed bars resting on the shelf 17 and a transverse angle 18 at their rear ends; and they compel the gases to pass at least in part back through the water tubes 7 before descending. By changing the form and number of these baffles 16 I can regulate the amount of superheat-by controlling the portion of the gases which must flow back over the superheating tubes. The superheater preferably consists of U-shaped tubes extending between the boxes 19 and 20. These boxes are suitably supported in the top wall or roof of the setting, and one of them is suitably connected by pipe 21 with the steam space of the middle steam and water drum. The oft-take steam pipe 22 leads from the other boxes.

In the operation of the boiler, the gases rise from the furnace 23 and pass up among the tubes 6. They then pass back over the top of the battle 12 and are directed by the shelf 17 among the tubes 7. They are also at least in part forced back through the upper parts of the tubes 7 and into the pocket containing the superheater. The gases then descend in the second, pass from the superheating tubes and the water tubes, and then rise through the bankS to the outlet flue 24. Steam may pass through the superheater in the ordinary manner, and during this double pass through the superheater tubes will be subjected to the heat of that part of the gases entering and flowing through said pocket.

In Fig. 2 I show a form similar of Fig.

to that 1, except that the superheater is inverted, the boxes 19 and 20 being at the lower end of the superheater and preferably below the stepped part of the battle. The steam connections will in thiscase lead from the middle upper drum 3 down to one box, the steam outlet being taken from the other box. I

In Fig. 3 I show another form similar to Fig. 1, except that the superheat'er is intherefore their position with ,1 serted through the side wall of the setting.

In this case the boxes 19 and 20" are set inthe side wall and the U-shaped tubes project across the second bank. In this case the U-shaped tubes may extend practically across the whole bank, or the 'superheater may be duplicated in the opposite s de walls. each set of tubes extending not .over half way across the bank.

The advantages of my invention result from the combining of the U -shaped superheater with this type of bpiler; also. from the eculiar locating of the\ superheater in the ank pocket. The supplemental baflles through the bank maybe used to adjust the amount of superheat and the construction is simple and eficient. The superheater may also be applied'to existing boilers without.

i tubes are: employed.

1. In a supe rheater boiler, the combination with a plurality of steam and water drums, a transverse mud drum, and two spaced banks of'tubes connecting the same, of a bailie located longitudinally. in front of the advance bank, a suprheater located in the space between the banks of tubes, a continuous bafl'le also located in said space and separating the rear bank of tubes from the superheater and the bank in advance thereof, to cause the gases to first pass substantially the full length'of said advance bank of tubes and'also heat the superheater, and afterward pass to'the rearbank of tubes, and a baffle located in front of the advance bank of tubes.

2. In a superheater boiler, the combinationswith a plurality of steam and water.

drums, a transverse mud drum and spaced banks of tubes COIlDGCtlIlg the same, of a sulperheater located inthe space between acent banks oftubes, a continuous baffle alsoslocated in said space, said bafile separatiiigfthe rear bank of tubes from the superheja ter and from the advance bank of tubesyand bafiling means for causing-gases to ass transversely through the advance ban of tubes to, the superheater, and after traversing the same to return to said advanoebank of tubes.

- venting the gases It will relation to other banks, or in fact' whether or not other banks of 3. In a superheater boiler, the combination with a plurality of steam and water drums, a transverse mud drum and spaced banks of tubes connecting the same, of a superheater located in the upper portion only of the space between the adjacent banks of.tubes, and a continuous bafile also located in said space and separating the rear bank of tubes from the superheater and the advance bank, said bafiie having a pocket in which the said superheater is located, and said pocket being open to the gases passing across the advance bank of tubes, but prepassing therethrough directly to the rear bank, and a bathe in front of the advance bank for causing the gases to pass to the pocket. 7

4. In a superheater boiler, the combination with a plurality of steam and water drums, a transverse mud-drum and spaced banksof tubes connecting the same, of a su erheater located in the upper portion on y'of the space between the adjacent banks of tubes, a bafile also located in said space,

said bafiie separating the rear bank of tubes from the superheater and the advance bank of tubes, said baflle having a-pocket' in which the said superheater is located and said pocket having a rear wall, a transverse baffle for deflecting the gases across the upper portion of the advance bank into the upper portion of the pocket, the bottom of said pocket causing the gases to return to the advance bank of tubes. f I

5. In a superheater boiler, the combination with a plurality of upper steam and water drums, a lower mud drum and a first and second bank of tubes connecting the upper and lower drums, a bafiie extending behind the first bank of tubes and terminating short of the upper end thereof, a bafiie arranged behind the second bank of tubes and terminating short of the lower end thereof, said latter baflie being continuous and having a rearwardly extending pockettherein, a superheater located in the pocket behind the second bank of tubes, and a transverse battle extending from the first bafile transversely of the second bank of tubes between the ends of the pocket and the superheater to cause the gases from the upper end of the first pass to'pass transversely across the upper end of, the second bank of tubes, into the pocket, said pocket causing such gases to passfrom the super- ,heater back to the second-bank of tubes.

6; In a superheater boiler", the combina-' tion with a plurality of upper steam'and water drum's,la lower mud drum and at least threebanks of tubes connectin and lower drums, a baflie locate behind the first bank of tubes and terminating short of the upper end thereof, a secondcontinuous bafiie located in the spaeebetween the second i .and third banks vof. tubes and terminating the upper short of the lower ends thereof, said bafile having a rearward ofiset forming a pocket, a superheater located in said pocket and a transverse bafile extending from the first baflle transversely of the second bank of tubes between the upper and lower ends of the pocket and superheater, said batlies causing an upward draft of gases in the first pass and longitudinally of the first bank of tubes, a transverse passage across the upper end of the seoond bank of tubes into the pocket and into engagement with the supereater, a return from said pocket and-superheater into the second pass and downwardly therethrough, and through the third pass.

In testimony whereof, I have hereunto set my hand.

J .HN E. BELL. Witnesses:

G. K. WANNEM} nan, CHAS. B. KNUDSON.

an upward passage 15 

